Wrench



(No Model.)

I. ORESSEY.

WRENCH. No. 314,517. Patented Mar. 24,1885.

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UNITED rains ATENT rricn,

ISAIAH ORESSEY, OF BOSTON, ASSIGNOR TO THE PORTER MANUFAGTUR- IN GCOMPANY, OF REVERE, MASSACHUSETTS.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 314,517, dated March24:, 1885.

Application filed November 3, 1884.

To all whom it may concern.-

Be it known that I, Isnrnrr GREssEY, of Boston, county of Suifolk, Stateof Massacha setts, have invented an Improvement in Wrenches, of whichthe following description,

in connection with the accompanying drawings, is aspecifieation, likeletters on the draw ingsrepresenting like parts.

This invention relates to pipewrenches,

[O and is intended as an improvement upon that class of wrench wherein afixed jaw having an angular inner face and a screw -threaded shankportion integral therewith is provided with an adjustable slide-block,upon which is pivoted a spring-held movable jaw having a serratedbearing face, the relative arrangement of the said jaws being such as toafford a smaller space for the admission of the pipe or othercylindrical object to be grasped than between the biting-faces thereof.

This invention has for its object to produce a wrench more durable andsimple in con-. struction than those heretofore known to me; and itconsists in details hereinafter fully de- 2 scribed.

Figure 1 is a side elevation of a wrench embodying this invention, theadjusting-nut being turned on the screw-threaded shank away from theslide-block; Figs. 2 and 3, de-

tails of the slide-block and movable jaw, re-

spectively.

The fixed jaw a, screw-threaded shank portion a integral therewith,handle A, movable jaw I), having a serrated biting -face, b,

and spring I), mounted on the slide-block c,

are all as usual, so need not be herein described.

To gain greater rapidity in the adjustment of the parts above referredto, I have provided the screw -threaded shank portion a with anadjusting-nut, d, disconnected from the slide-block c, as shown in Fig.1, thus permitting free access to all parts thereof, and allowing it tobe turned on the screw-threaded 5 shank-portion a complete rotation ormore by one movement on the part of the operator.

Then the apparatus is in use, to grip the pipe or other cylindricalobject, the adjusting-nut is turned on the shank portion until it bearsdirectly against the slide -block 0,

when it serves as an abutment therefor.

slide-block c is provided with a projection, e, a cross-section ofwhichincludes a little more than a half-circle, which forms a pivot forthe The (No model.)

movable jaw 11, which is provided with a eor- 5 respondinglyshapedrecess, (see Fig. 3,)said movable jaw being passed laterally on the saidprojection 6, thus forming a pivotal connection better adapted to resistthe strain exerted upon it, and of cheaper construction 6 than, thehingejoints heretofore used. The movable jaw is prevented from lateralmovement on the projection e by means of a bolt passing entirely throughthe same, and having a flattened head larger in diameter than thediameter of the saidprojection, and secured by a nut of as largediameter as the head.

It will readily be seen that owing to the peculiar shape. of theprojection e the movable jaw b, when once mounted thereon, cannot 7oslip off, and the projection extending the entire width of theslide-block 0 also being flush with the sides of the movable jaw,affords a fulcrum therefor capable of resisting great strain. 5

WVhen desired to grip apipe or other cylindrical object, the springheldmovable jlaw bis compressed by means of the tailpiece 2, the slide-blockc is moved forward to bear against the pipe, the adjusting-nut is thenturned on the screw-threaded shank-portion until it bears directlyagainst the said slide-block, when the movable jaw ,is released,gripping the pipe firmly, the adjustingnut in this position' serving asan abutment for the slideblock.

I claim- A wrench having a fixed jaw, a, screwthreaded at its shank, aslide-block, 0, adapted to slide thereon and provided with a rounded opivotal projection, e, a spring-held movable jaw, I), having a serratedbearing-face and a tailpiece, 2, and provided with a recesscorresponding to the said projection e,upon which it is mounted, abolthaving an enlarged head and nut passing through said projectionpreventing lateral movement of the movable jaw, a spring, b and anadjusting-nut, all con structed and operated substantially as described.I

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ISAIAH ORESSEY.

IOO

Witnesses:

B. J. NoYEs, J os. P. LIVER-MORE.

